Siebold's Hosta

Hosta sieboldiana

Asparagaceae · perennial · introduced

Last updated April 20, 2026

Data Maturity Baseline

This profile contains verified botanical data. Regional field notes and expert review are in progress.

Field Observations

Field Observation

Hosta sieboldiana · Siebold's Hosta

new leaves

April 25, 2026 · Soos Creek Botanical Garden · 1,580 GDD₃₂ · BBCH 09

Field Observation

Hosta sieboldiana 'Frances Williams' · Hosta

leaf emergence

April 20, 2026 · Lake Wilderness Arboretum · 1,509 GDD₃₂ · BBCH 11

Origin

Japan

Stage	Typical Window	What to Look For
new leaves BBCH 09	—	Leaves emerging from dormant crown
Leaf emergence BBCH 11	—	Initial leaf expansion from crown